TRAFFIC RECOVERY AT INTERWORKING NODES
First Claim
1. A method of performing traffic recovery at a boundary node for interworking between a first network and a second network, the node comprising first equipment for interfacing with the first network and second equipment for interfacing with the second network, the first equipment comprising a switch fabric, a first interworking interface and a second interworking interface for carrying traffic between the second equipment and the first equipment, wherein each of the interworking interfaces is for interfacing with a respective traffic-carrying path of the second network, the method comprising, for traffic flow in a direction from the second network to the first network:
- determining that recovery switching is required for traffic on one of the traffic-carrying paths of the second network; and
performing a recovery switch, using the switch fabric in the first equipment, to switch between the interworking interfaces to achieve a recovery switch between the traffic-carrying paths of the second network.
1 Assignment
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Accused Products
Abstract
A boundary node for interworking between a first network and a second network comprises first equipment for interfacing with the first network and second equipment for interfacing with the second network. The first equipment comprises a switch fabric. A first interworking interface and a second interworking interface are provided for carrying traffic between the second equipment and the first equipment. Each of the interworking interfaces is for interfacing with a respective traffic-carrying path of the second network. For traffic flow in a direction from the second network to the first network, a method comprises determining that recovery switching is required for traffic on one of the traffic-carrying paths of the second network and performs a recovery switch, using the switch fabric in the first equipment, to switch between the interworking interfaces to achieve a recovery switch between the traffic-carrying paths of the second network.
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Citations
15 Claims
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1. A method of performing traffic recovery at a boundary node for interworking between a first network and a second network, the node comprising first equipment for interfacing with the first network and second equipment for interfacing with the second network, the first equipment comprising a switch fabric, a first interworking interface and a second interworking interface for carrying traffic between the second equipment and the first equipment, wherein each of the interworking interfaces is for interfacing with a respective traffic-carrying path of the second network, the method comprising, for traffic flow in a direction from the second network to the first network:
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determining that recovery switching is required for traffic on one of the traffic-carrying paths of the second network; and performing a recovery switch, using the switch fabric in the first equipment, to switch between the interworking interfaces to achieve a recovery switch between the traffic-carrying paths of the second network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for use at a boundary node for interworking between a first network and a second network, the apparatus comprising:
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first equipment for interfacing with the first network, the first equipment comprising a switch fabric; second equipment for interfacing with the second network; a first interworking interface and a second interworking interface for carrying traffic between the second equipment and the first equipment, wherein each of the interworking interfaces is for interfacing with a respective traffic-carrying path of the second network; and control logic which is arranged to; determine that recovery switching is required for traffic on one of the traffic-carrying paths of the second network; and perform a recovery switch, using the switch fabric, to switch between the interworking interfaces to achieve a recovery switch between the traffic-carrying paths of the second network. - View Dependent Claims (11, 12, 13, 14)
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15. A non-transitory machine-readable medium carrying instructions which, when executed by a processor, cause the processor to perform a method of performing traffic recovery at a boundary node for interworking between a first network and a second network, the node comprising first equipment for interfacing with the first network and second equipment for interfacing with the second network, the first equipment comprising a switch fabric, a first interworking interface and a second interworking interface for carrying traffic between the second equipment and the first equipment, wherein each of the interworking interfaces is for interfacing with a respective traffic-carrying path of the second network, the method comprising, for traffic flow in a direction from the second network to the first network:
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determining that recovery switching is required for traffic on one of the traffic-carrying paths of the second network; and performing a recovery switch, using the switch fabric in the first equipment, to switch between the interworking interfaces to achieve a recovery switch between the traffic-carrying paths of the second network.
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Specification